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MathsJEE Main 2 Apr 2026, Shift 1·Q8·MCQ·Easy–moderate

Statistics · Mean of grouped data

If the mean of the data
Class5-1010-1515-2020-2525-3030-35
Frequency2kk2854k+1k+15
is 21, then kk is one of the roots of the equation:
  1. (1)2x2−23x−10=02x^2 - 23x - 10 = 0
  2. (2)4x2−35x+24=04x^2 - 35x + 24 = 0
  3. (3)2x2−19x−10=02x^2 - 19x - 10 = 0
  4. (4)2x2−35x+98=02x^2 - 35x + 98 = 0

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See the full 2 Apr 2026, Shift 1 paper